Sanding-machine.



J. W. KROEZE.

SANDING MACHINE.

APPLICATION FILED APR.22,1912.

Patented Oct. 22, 1912.

3 SHEETSSHEET 1.

Mkzwesses J. W. KROEZE.

SANDING MAGHINE.

APPLICATION FILED APR.22,1912.

Patented Oct. 22, 1912.

3 SHEETS-SHEET 2..

Jab): lZ-lraeze J. W. KROEZE.

SANDING MACHINE.

APPLIOATION FILED APR.22,1912.

Patented Oct. 22, 1912.

3 SHEETS-SHEET 3.

mp. 1m

,vide'a machine whiih' is adapted to the sand 1 curved surfaces of the like.

ling specification.

panying drawings, in which- -*ig. 8' is a detail section of the belt-shoa l a onnw; KRQEZE, or schema sanhms ra intense. I v Application filed April a2,

To all whom it may concern:

'Be it known'that 1, JOHN -W.- Knoazn, a citizen of the United States, residin at Burlingame, in the county of San ateo and State of California, have invented new and useful Imp-rovementsin S'anding-Ma-f chines, of which the following isa specification.

This invention relates to improvements in a sanding machine, and particularly erta'ins toea machine for surfacing lum r,' such'as'described- 'in Patent No. 998,351 issued to me July 1.8, 1911. v

It is the objeet of. this invention to proing of surfaces and edges of panels and which maybe utilized for sanding the moldings, columns and Other objectsfwill appear in the follow-i The invention consists of the parts and the construction and combination of parts as hereinafter .more fully described and claimed, having reference to the accom- Figure 1 is a view of the invention in side elevation. Fi 2 is a detail section on the line X-X of l ig. 1. Fig. 3 is a plan view. 1 Figs. 4. and 5 are views in elevation with? parts broken away, showing the machine as i adapted to sanding curved surfaces. Fig. 6 is a detail vertical section on the line Y-Y of Fi 5. Fig. 7 is a detail in plan with arts roken away of the clutch mechanism. f

shiftingmechanism. Fig. 9 is a detail section'on the line Zi -Z of Fig. 3. Fig; 10 is a5 detail elerati-onpf the canriage shifting dei vice. Fi 11 isa detail showing the manner arm.

y In the drawings, A represents the frame of thezmachine which may be of any suitable construction. Supported on the frame A is a horizontally disposed table 2, which is designed to be raised and lowered to position it on difierent levels by means of ver-ti- 5 cally extending threaded rods 3 attached to? the corners of the table 2, which rods pass through worn nuts 4. The worm nuts mesh i Specification oi Ilettem'fiateat.

- camronmm 1912... Serial are. 692,316. 7

' Extending la-terally'across the top of the I table 2 are rails 7, in this case four in 1mmber, and mounted to travel on each ,pair of the rails 7 are trucks .8 carrying platfomns 9- 9'. The upper surfaces of the platforms .9--9 are .on a common level and have longitudinally extending rails 10l0 mounted thereon on which a panel carrying carriage 11 is designed to travel; the carriage 11 being provided with rollers 12 which rest on the rails 1010. The rails 10-10 on the platforms 9-9 are designed to be connested together .byineans of fishplates, or

. in any suitable manner, so that the carriage 11 may be moved in any desired manner, either manually or mechanically, as will be later described, back and forth on the platforms 9-9.

Rotatably mounted on each end of the frame A is a pulley wheel 13-13, around which an endless sanding belt B is adapted to travel; the belt bein composed of a suitable fabric with .an,a. rasive substance on either one or both of its surfaces. The pulley 13 is mounted on a shaft 14 extendmg through. adjustable bearing blocks l5 15, which in turn are supported upon a movable frame 16, slidable in suitable bearsings on the frame A and adapted to be adjusted thereon by means of a horizontally disposed threaded screw 17 mounted in the threaded bearing .on the frame A. This screw 17 is provided with a hand-wheel 18 on its outer end, by means of which the screw 17 may be rotated so as to move the slid-able plate 16 backward or forward on its mountings in the frame A. to move the pulley wheel 13 in such a manner as to ad- 'ust the tension of the abrasive belt B. The hearings -15 are adjustable on the plate so as to permit of the shaft 14L being alined to ust the pulley 13 so that the true travel of the belt B over the. pulleys 13 13 will be insured. The pulley 13 is mounted on me'c' anism. The

on the shaft; a'ni ler pulley 19 bein provided to which the drivmg bolt, (not s own) may be shifted in the manner and for the pur ose commonly employed 1n drlvmg ulleys 13-13 are designed to be space at a considerable distance apart to obtain along s an of the sanding or abrasive belt 1B, wh1c span Wlll be varied in difi'erent machines to suit the length of the material to be handled.

The tracks'7 on the table 2 may be extended some distance forward thereof, as shown in Fig. 3, the projecting portion of the tracks being formed of separate ra1ls -7 which are designed to be attached to or removed from the table 2 as desired. Each rail 7 is provided with a downwardly "e2;- tending pm 20 on its inner end which 1s adapted to be inserted in a socket 21 mounted on the table frame 2; the inner end of each rail 7 being squared to abut against the outer end of the rail 7 to prevent the rail 7 from being turned from side to sideon the table frame 2. This'construction is particularly shown in detail in Fig. 2.

The platforms 9-9' are desi ned to be moved backward and forwar vlaterally across the table 2 under the upper strand of the belt 13 and are ada ted to be moved in unisonwhen connecte together, or they may be moved so arately and independently of each other w en desired. The carriage 11 is designed to be moved backward and forward on the platforms 9-9 parallel with the belt B in any suitable manner. The carriage 11 is here shown as adapted to be moved by means of a hand-wheel 22,

which rotates a hollow shaft or sleeve 23, mounted on the platform 9 on which a drum 24 is securely mounted; a cable 25 Woundon the drum 24 having its terminals extending in opposite directions and attached to the ends of the carriage 11 in such a manner that as the drum 24 revolves, one portion of the cable will be wound thereon as another portion unwinds, thus causing the carriage 11 to move along the rails 10-10 on the platforms 99.

From the foregoing it will be seenthat the carriage 11 ma be moved into any position desired beneat the belt 13 longitudinal adjustmentbeing obtained by movin the carria e 11 on the tracks 10; ateral adjustment y movin the platforms 9-9 on the rails 7 carried y the table 2; and horizontal plane of the carriage 11 in relation to the belt B being adjusted .by the handwheels 6, by which the table 2 is raised or lowered. The latter adjustment permits of lated as desired.

.11 may be operatedrmchanicallyi the as... 11 ii e 'beltB being. reg'u the distance separating" the upper. strand oft Means are provided by which the carrie driven by power. This is accomp mounting a pair of loose pulleys 26-26' on the outer'en of a shaft 23 which extends into and is feathered to the hollow shaft 23; the pulle 26 being rotated by a straight belt 27 rom the ished by other pulley 26be1n rotated irbthe op 0- site direction througfi a cross, belt. 27', indicated' dotted lines in Fig. 3.";Disposed between t-he'pulleys 2626'-and"keyed on the shaft 23 1s a double-faced cone clutch 28 which is adapted to be thrown into engagement with either of the pulle 5 26-326, or be retained in an 'interme iate'position out of contact with both pulleys, asjshown 1n F1g. 7.. Theolutch 28fis adapted-rte be reclprocated by'the shaft 23'by managers drive-shaft 1d and the that." is, l

yoke 29 on a rod 30, whichrod'in lturn 'is reciprocated by means of a grip or clamp. Thls clamp consists of a segment 31, formed on a lever 32"pivoted at 33 to'the platform 9; the segment beingv disposed ad acent to the rod 30, which admits of its being so disposed in relation to' the rod 30 that when it is rocked on the pivot 33 the curved. portion of the segment will be caused to contact the bar 30 and press the latter against a guide 34 on theplatform 9, thus gripping the rod and causing it to move the segment and operate the clutch28. The lever .32 is operated by means of a lever 35 mounted on t e platform 9 and connected to the lever 32 by means of a rod 36.

From the foregoing it will be seen that when the segment clutch 31 is out of engagement with the rod 30, it will ride freely on the rod 30 as the latform '9 is moved outwardly and inwar y on the table 2 so that the clutch willbe in a position to operate the rod 30 irrespective of the position of the latform 9. It is also apparent that the te esco ic connection of the shafts 23-23 wil admit of the drum 24 being rotated from the shaft 23 regardless of the position of the platform 9.

Clam ed on the u per end of a standard 36 is a orizontally isposed arm or bracket 37 which extends transversely across the machine and terminates above the belt B midway between the pulleys 1313, and to the outer end'of which a vertically disposed tubular member or bushing 38 is attached when it is desired to sand broad flat surfaces; the bushing 38 being removed when it is desired to sand the ed es of panels or curved surfaces. The bushmg38 is attached to the arm 37 b means of bolts '37 which pass through a ange formed on A l L a the miter end of the arm and a correspond: ing fl nge carried by the bushing, as shown in Fi 11. Mounted in the bushing 38- is a cylin rical casing 39, which has rack teeth formed on its side adapted to be engaged by gear teeth on a segment 40.- The segment 40 is pivoted at 41 and has a lev er handle connected thereto, by means of wh ch the segmentmay be rocked on its bearing to adjust the position of the casing 39 in the bushing 38. A thumb screw 42 on the segment lever extends through a slot on va bracket formed on the bushing 38, and is provided for the purpose of clamping the se ment lever in a fixed position.

Mounted in the casing 39 ,is a plunger 43 on which is secured a stem 44 which extends upward and through 'thetop of the casing 39 and is guided therein. A spring 45, wound on the stem 44 between the top 'of the plunger 43 and the end of the casing 39, normally retains'the plunger in its lowermost position and forms a cushion against the upward pressure of the plunger 43.

A cross-head or bracket 46 is rigidly mounted on the lower end of the plunger 43 through which upwardly extending threaded studs 47 on a shoe 48 extend; wing nuts 49 being screwed om the upper ends of the studs to clamp the shoe 48 against a knob formed on the undersideof the cross-head 43. The shoe 48 is designed to bear against the upper surfaoe of the belt B, as shown in Fig. 8, when the bushing 38 is mounted on the bracket 37 and the upper-leaf of the sanding belt B is positioned so as to extend horizontally between the pulleys 1313, as indicated in dotted lines in Fig. 1, which an rangement is employed when it is desired to sand fiat surfaces. 7.

In the operation of this portion of the invention, the panel or board to be sanded is placed on the carriage 11, which is positioned, as indicated in dotted lines in Fi 1, beneath the up er leaf of the abrasive ielt B; the level 0 the carriage 11 being'adjusted by the hand-wheels 6 and their connections, before described, to suit the thickness of the material to be worked. The plat-forms 99 and the carriage 11 are then moved to the desired position wit-h relat-ion to the belt B and the shoe 48 on the arm 37. The driving pulley 13 then being set in motion and the shoe 48 lowered upon the-belt B, the latter is thrown into contact with the panel on the carriage 11 and is drawn thereacross by the rotation of the driving pulley 13.

It is obvious that the area of working surface of the belt B will be that of the shoe- 48, so that in handling a panel of considerable size it will be necessary to shift the panel from side to side and longitudinally,

which is accomplished by operating the platforms 99 and the carriage 11, as before described, to bring the entire surface of the panel under the shoe 48. I

The valuable feature of th1s machine is its I passing under and away from the shoe 48.,

thereby confining the action of the belt to the fiat surface of the shoe 48.

When the machine is employed in sanding panel surfaces, as previously described, the

belt B is rove on the pulleys 13l3 so that its abrasive surfacewill be on its inner face, the working face-of the upper leaf of the belt thus being on its underside.

, Means are provlded whereby the .belt may be positioned to surface thevertical' edges of panels and the-like, which means is here shown as consisting of a vertically disposed arm 50, adjustably mounted on a standard 51, which is designed to be positioned adjabent to the outer edge of the abrasive belt "B opposite the table 2, midway between the pulleys 13-13, as shown in Fig. 1. The arm 50is formed with a longitudinally extending slot 52, through which a bolt 53 is passed; the bolt 53 extending through the arm 50 and through the upper end of the standard 51; the head of the bolt bearing against the outef face of the arm 50, as

shown'in Fig. 6. A jam nut 54 is screwed on the threaded inner end of-the bolt 53 so as to clamp the arm 50 against the standard 51 and thereby securely hold it against movement.

Revolubly mounted on the outer ends of the arm 50 are idler pulleys 55.56; one end of the arm 50 being bent so as to ofiset the pul1eys-55 and 56, as shown. When it is desired to sand .the edges of panels, the carriag'e' 11 and platform 9 are thrown out of operation, and the platform 9 is discon-' nected from the platform 9 so that it may bemoved independent of the latter. The

arm 50 is then disposed in a vertical osi: tion, as shown in Fig. 1, and an endless abrasive belt having its abrasive surface on its outer side is rove around the pulleys 13--13,as'before described; the upper leaf of the belt being rove under the idler pulley 55 Ont-he arm 50, up and over the idler pulley' 56, thus disposing that portion of the 1-20 abrasive belt B between the pulleys 55 and 56.. in avertioal position. The table 2 is then adjusted to such a height that the rails 7 will roject over that, portion of the abrasive it B extending between the pulleys 13 and 55. The panel to be sandedfis I rails 77 so as to carry then placed on the platform 9 Witlb its edge to be finished ad'a'cent to the vertical portion of the abrasive elt B. The platform 9 is then moved backward and forward on the the edge of the anel across the vertical face of the abrasive elt B.

A shoe 57, mohnted on a bracket 58, is positioned so as to bear against the back of the abrasive belt B opposite the contact of the latter with the material being worked. The bracket 58 is attached to the arm 50 by means of a bolt 59 which is passed through a slot in the bracket 58 and the slot 52 formed in the arm 50; ajam nut 60 being screwed on the bolt 59 to clam the bracket 57 on the arm 50, as shown in ig. 1.

When it is desired to sandccurved surfaces, the arm 50 is positioned on the standard 51, asshown in Figs. 4 and 5. Inthe former the abrasive belt B is shown as passing under the idler pulley 56, up and over a curved shoe 61, mounted on the arm 50, and from thence passin under the idler pulley 55 and over the rive pulley 13. The shoe 61 may be of any desired curvature accordin to the nature of the surface to besande In the arrangement shown in Fig. 5 a shorter abrasive belt is employed; the belt being passed from the underside of the drive pulley 13, around and over the idler pulley 55, then under the idler pulley 56 and over the riving pulley 13; the arm 50-being disposed in a horizontal position. In this case the abrasive surface, of the belt Bv is on the outside and the curvature for sand ing'curved surfaces is formed by the idler pulley 55.

It is manifest that the arm may be disposed in any suitable position by reason of its adjustable connection or adjustable mounting on the standard 51, and. that by the use of the adjustable arm 50 the idler pulleys and 56, I am enabled to employ my sanding machine 'in the finishing of curved and irregular surfaces as well as the edges of broad surfaces ofpanels, boards and the like. T i

The standard 51 is slidably mounted on a rigid dovetail plate5l and is designed to be moved so as to dispose the idler direction rollers 5556 in or out of line with the abrasive belt 13; the standard 51 being clamped to the plate 51 by means of bolts in any desired manner when it is to be held in a stationary position.

Having thus described my invention, what I claim and desire to secure by Letters Patent is Q 1. The combination with an' endless abrasive belt and means for rotatin same, of a pair of idler pulleys adapted to ear against oint of one'leaf of the belt, an adjustable arm on which said idler pulle s are revolubly 65 mounted, said arm formed with a long1- tudinally extending slot, means for adjusting. the arm in various positions, compris-' ing a bolt passing through the'slot therein, and a standard carrying said bolt to which the arm is clamped. I V

2. The combination with an endless abra sive belt and means for rotating same, of a pair vof idler pulleys adapted to bear against one leaf of the'belt, an adjustable arm on which said idler pulleys are revolubly mounted, said arm formed with a longitii'dinallyextending -slot, means for adjusting the arm in various positions, comprising a bolt passing through the'slot'80 therein, a standard carrying said bolt to which the arm is clamped, and an adjustable support for the materials to be worked arranged adjacent to the abrasive belt.

3. In a sand papering machine, the combination with an endless abrasive belt and Laneans for driving same, of a pair of idler pulleys engageable with the belt, an arm carrying said idler pulleys, a standard, means for clamping the arm to the standard in various positions, a base plate on which the standard is mounted, a dovetail plate on which the base plate is slidable, and means for clamping the base plate to the dovetail plate.

.4. In a sand papering machine, the combination with an endlessabrasive belt and means for driving same, of a pair of idler V pulleys engageable with the belt, an arm carrying saididler pulleys, formed with a longitudinally extending slot, a standard, a bolt carried by the standard engaging the slot in the arm by which the arm is clamped to the standard in various positions, and means for adjusting the standard inrelation to the belt.

5. In a sand papering machine, the com bination with an endless abrasive belt and means for driving same, of a pair of idler pulleys engageable with the belt, an arm carrying said idler pulleys, formed with a longitudinally extending slot, a standard, a bolt carried by the standard engaging the slot in the arm by which the arm is clamped to the standard in various positions, means for adjusting the standard in relation to the belt comprising a base plate on which the standard is mounted, a dovetail plate on which the base plate is slidable, and means for clamping the base plate to the dovetail plate. p

6. In a sand papering machine, the combination with an endless abrasive belt and means, for driving same, of a pair of idler pulleys engageable-with thebelt, an arm carrying said idler pulleys, formed with a longitudinally extending slot, a standard, a bolt carried by the standard engaging the slot in the arm by which the arm is clamped to the standard in various positions, an adjustable support for the materials to be worked arranged adjacent to the abrasive belt, means for adjusting the standard in relation to the belt comprising a base plate on which the standard is mounted, a dove- 10 tail plate on which the base plate is slidable,

and means for clamping the base plate to the dovetail plate.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

I JOHN W. KROEZE. Witnesses:

JOHN H. HERRING, GENEVIEVE S. DONELIN. 

